// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package systrap

import (
	"unsafe"

	"golang.org/x/sys/unix"
	"gvisor.dev/gvisor/pkg/abi/linux"
)

func (q *contextQueue) wakeupSysmsgThread() {
	unix.RawSyscall6(unix.SYS_FUTEX,
		uintptr(unsafe.Pointer(&q.numThreadsToWakeup)),
		linux.FUTEX_WAKE, 1, 0, 0, 0)
}
